EP 0229183 B1 19910925 - WIRE CUT ELECTRIC SPARK MACHINE
Title (en)
WIRE CUT ELECTRIC SPARK MACHINE
Publication
Application
Priority
JP 12913785 A 19850615
Abstract (en)
[origin: WO8607294A1] A wire cut electric spark machine provided with a tapering control unit improved so that a tapering process can be carried out with a high accuracy even when the rigidity of a wire electrode varies due to the variations in the temperature thereof which occur when a working current varies. The information representing the relation between a working current and a tapering angle in the whole control range of a taper angle to be controlled is prepared in advance. A means for setting a working current, and a means for inputting a current program so that the working current varies with the lapse of time, or a means for detecting the working current are provided. The above information is read in response to the working current set, and program-inputted so that the current varies with the lapse of time, or detected. Computation is carried out on the basis of this information, if necessary, to determine a correction value with respect to the tapering angle. The tapering angle is corrected by using this correction value, and a tapering process is then carried out by using the corrected tapering angle.
IPC 1-7
IPC 8 full level
B23H 7/02 (2006.01); B23H 7/04 (2006.01); B23H 7/06 (2006.01)
CPC (source: EP KR US)
B23H 7/04 (2013.01 - KR); B23H 7/065 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
WO 8607294 A1 19861218; DE 3681716 D1 19911031; EP 0229183 A1 19870722; EP 0229183 A4 19881024; EP 0229183 B1 19910925; JP H0364254 B2 19911004; JP S61288929 A 19861219; KR 870700433 A 19871229; US 4801779 A 19890131
DOCDB simple family (application)
JP 8600289 W 19860611; DE 3681716 T 19860611; EP 86903590 A 19860611; JP 12913785 A 19850615; KR 870700127 A 19870213; US 3084987 A 19870312